Cretaceous. Bear Paw Formation. Southern Alberta, Canada. From the Devonian Period to the end of the Cretaceous, ammonites generated tens of thousands of species that invaded nearly every salt-water habitat in the world. Ammonites species came so fast and furiously that the average species only lasted a million years or less. This quick turnover means that ammonites are near-perfect paleo-clocks.


  • Title: Ammonite, Iridescent (Placenticeras)

Get the app

Explore museums and play with Art Transfer, Pocket Galleries, Art Selfie, and more


Google apps